[Prognosis of long-term results of aortic and mitral valve prosthesis by the data of treadmill test].

The treadmill test was conducted in 328 patients who underwent prosthetics of the aortic or mitral valve for rheumatic heart disease. The object of the test was evaluation of the heart pumping function according to the dynamics of the oxygen debt, pulmonary hypertension according to the pseudoanaerobic threshold, and decompensation of metabolic acidosis according to the appearance of the hypocapnic reaction. The findings were compared with the results of preoperative examination. The results of the preoperative treadmill test were found to be in accord with the probability of a positive effect of prosthetics. Depending on an increase of the critical loads level this probability rose from 2 to 87% in mitral and from 25 to 100% in aortic prosthetics. It is shown that development of lactoacidosis decompensation in addition to the heart pumping function defect significantly aggravates the late-term results of the operation.